Extracting data

From: Stephan Grein (grein_at_informatik.uni-frankfurt.de)
Date: Wed Feb 04 2015 - 05:55:37 CST

Dear NAMD users,

i want to extract information from my DCD file as follows:

   set from {1 10 20 30}
   set to {40 50 60 70}
   set from_len [lindex $from]
   set to_len [lindex $to]
   set steps_start 101

   for {set i $steps_start} {$i < $num_steps} {incr i} {
      for {set j 0} {$j < $from_len} {incr j} {
         for {set k 0} {$k < $from_len} {incr k} {
            set mysel1 [atomselect top "index [lindex $from $j]"]
            set mysel2 [atomselect top "index [lindex $to $k]"]
              # do something with the selection, then delete it
           $mysel1 delete
           $mysel2 delete
     animate goto $i

But for me, this is horribly slow.
Is there any obvious failure in my snippet?

Would be glad, if someone could point it out.

Best regards,

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